Lookin pretty good. This is just the editor right now, right? Can't actually see the ships in action yet? Couple suggestions.. it kinda jumps a bit when you first start dragging a piece which I think is because you center it on the mouse, is that something you have to do for simplicity sake for the code? It's a bit disorienting. Also, if you could just click to highlight a piece already in place then you could add flip and delete buttons to the piece.